Bag coupling



0d. 3, 1933. Fb RlEBEL, JR ET AL Re. 18,962

BAG COUPLING Original Filed May 28. 1931 n A i A TToRNEY. .1,

Reissued '0a. 3, 1933 BAGy couPLrNG Frederick Riebel, J r.,

and Dewey M. Dow,

Toledo, Ohio, assignors to 'Air-Way Electric Appliance Corporation, Toledo, Ohio, a corporation of Delawarel original No. 1,906,366,

dated vMaren '1,v 41933,y

serial No. 540,525, May 2s, 1931. Application for reissue May 29, 1933. Serial No. 673,569

'z claims; (c1. 285-11) The present invention relating as indicated to an improved bag coupling, has more precise reference to a novel form of coupling or adapter to engage with the inlet opening of dust collecting bags usedin vacuum cleaner construction. The formof coupling embodying the principle ofthe invention is most particularly contemplated to be used with a. sanitary porous paper dust collecting bag. Heretofore a great amount of trouble and inconvenience has been experienced with bag couplings due to the fact that a satisfactory connection could not be obtained between the inlet mouth of the bag and the vacuum cleaner fan casing outlet. The chief disadvantage of such couplings existent in the prior art were that pockets and recesses in the bag mouthwere formed in such a manner that the dirt land dust would collect therein and a sanitary connection in a true sense of the word was therefore not obtainable.

It is the general object and nature Yof our present invention to provide `-a type of adapter or coupling whichvwill form a convenient and readily removable vconnection with the bag mouth as well as to render a. secure, air-tight and sanitaryl joint. Further advantages shall become apparent as the description proceeds. To the accomplishment of the foregoing-and; related ends, said inven-` tion, then, consists of the means hereinafter fully described and praticularlyv pointed out in the claims.

Fig. 1 is a sectional View of Vone form of coupling embodying the principle of our'invention.

Figs 2 and 3 are sectional views of alternative forms of construction.

Fig; 4 is a section taken substantially upon line 4`4 of Fig. 3. y

Fig. 5 is an exterior plan view of the form of tapered outer sleeve employed in the form of conlstruction shown in Fig. 3.

Fig.4 6 is an exterior plan view of the form of inner tube employed in the constructions shown VReferring more particularly to the drawing, our device consists essentially of the inner tube member indicated'generally at 1, having the outer tapered sleeve 2 tted thereover with the threaded securingring 3 adapted to removably secure the sleevev 2 in position. The inner tubey 1 pos-y sees a medial annularenlargement i which -isl adapted to be inserted within the mouth of the inlet neck 5 of a lter bag. As shown in Fig. V1, the cylindrical extension 6 may be added to the inner tube 1 inorder to accommodate a hose adapter.-V

The'fan casing end of the inner tube 1 is `interiorly bevelledv as at 'l and has an'externalcircumferential groove 8 which bevelled edge and groove are intended to facilitate engagement with a vacuum cleaner fan casing outlet or other delivery conduit for. the dust laden air stream that a0 is handled by a vacuum cleaner, indicated generally at 10. Positioned in the fan casing outlet 10 or other delivery conduit 'for the dust laden airY stream that is handled by a vacuum cleaner are the spring mounted ball-retaining means 11 65 and the knurled thumb screw` 12' which are adapted to engage with the circumferential groove 8. An annular -taperedtroughV 13 forms a complementary recess for the reception of the l tapered end '7 of the tube 1. '10 There are two types of known dust delivery conduits .in vacuum cleaners," one of the type vformed. on thefan. case, and the other embodied in a. cleaner wherein the dust. issucked into a collecting bag byv a fan which/exerts suction against the exterior o1', the bag, the' conduit in this case beingA a delivery connection to the chamber creasing in 'which the bag is carried.

Asmost clearly illustrated in Fig.v 5, a -longitudinal notch 9 is provided in the taperedsleeve 2, opening into the larger end thereof. The purpose of the notch 9 is to receive thelaterally extending section of the bag neck 5. v

. In order to minimizev parts employed in our device, the construction shown in' Fig. 2 may be resorted to wherein an annular' groove 14 and ilange 15 on the ring 3 are adapted to permanently and rotatably engage in a complementary circumferential channel 16 on the inner end of the outer`sleeve'2. 90 In the construction shown in Fig. 2, the sleeve 2 and ring 3,are shown secured together with practically no longitudinal movement therebetween. In order to aid'in forming contactof the threaded ring 3 with the threads on the tube l when the outer sleeve is inserted thereofver, the construction vshownin Fig. 3 is employed. It will be seen that in such construction thefannular groove 17 is much wider than the flange of the circumferential channel 18 on the sleeve 2. Like- ,wise the channel 18 possesses a materially increased width. In this manner there will be affected a substantial amount lof relative longitudinal motion between the sleeve 2 and the ring 3. The last described type of construction offers thel further advantage in that upon'l removal of the outer sleevev 2 from contact with the vconicalportion 4, the ring 3 will b e permitted to acquire a substantially complete' engagement with the threads on tnetube 1. since, upon installation 110 the' number of separable Y' of the bag coupling the sleeve 2 is wedged v enect aremovalthereof. Itwillthusfbeseen that in the disconnecting'operation oieconstmetion shown in Fig. 3 that sufficient force toremove the' outer sleeve 2 from its wedged positionis'allthat will'have to be exerted'upon the threaded ring, 3e whereas in the form of .construction shown in Fig. 2, additional or cumulative force will benen# essary in order to overcome the initiaLEhtening resistance of the threadsonf,tliisjri'ngpiy n v In order to effect 'a 'moza secure.-

of the margins of the bag neck 5a transverse annular shoulder l20 is positioned adjacent nthe' conical portion 4. The presenceof y, 20 serves to act as a snubbingpontwhiegreatlyr.; increases the retaining contact of the coupling.

The'outer edge of the tapered sleeve-Emmi) into the bell mouth 2ly in orderto serve as a.` guide when the 'sleeve' isrpiaced ini position over thebag necks V5 j ,Y 'It isito' be -notedthatan armularspaceis-formed between the sleevenzane thek tube r. extending l axially Athereof from' the shoulderZO to the ring; 3f,

. in those constructionssliownin l yil'jigs; 2 and- 3, as contrastedwiththatsl'mwninFgJ. j e Theannuiar space' serves tu .receive the constricted end portion; of paper` bag neck*Y and willv alTow the same to longitudinally-.in order to conform tothe: constricted interior surfaceof tll'egreducedend' ofl the sleeve 2. Since-a bag neck. of" sinlcient' diameter'A to.V embracethe widestr portion ofthe amul'arenlargement 4`-must ,be` employed, there will of necessity bel a certain amount ofwrinklinggin theend portionothebag neck asit vis contractedl into the restricted space within 'the sleevey 2i. Employment' oftlre` construction l'shown in Figs.' 2 and Stprovides va relanarrow. annular region of* wedging contact between the sleeve andthe. annular 4L andf this wedgi'ng ContactV is had inthe region Vcal nose ofthe enlargement 4 will" spread the bag' o( the largest diameters of cofacting menrhers, where tlie bag neckwtlbe lstreikrziledsmoothly' andwith'out wrinkles;V ohviatesanytencn ency of the wrinkledend portion of thezbag neck to lassume the' bulrle'nV of wedging connectiinnj be'- tween the sleeve and annularenlargemeniz which wouldl result in. a poorly sealed connection' in which air and particles 'o1' .condi escape through-the longitudlnalcharmels formed by such Wrinkles.'VV The annular enlargement @is fbi-ined with a conicanose facing; toward the projecting end of the coupling tube r. Between this coriical'nnse andthe flaredv portion ZI ofthe sleeve 2; or'A the projecting larger endoi the sleeve; there is formed albag neck receiving mouth which' opens axially towardthe proie'cting end o1" the coupling ,and 'whichl aredbothradially outwardly ra;- diallyv inwardly so as" to' facilitate the introduction of a neck'ntossridl mouth; In applying a bag neck to the coupling.: the projecting end'of the tuberir is `irstinscizrieilinto the bag 'neckand as, thelatter is pushed'jver` the tube, the: coni*-y neck untir the latter is engaged and' again con` .tract'edi inwardly by the: prpiecting larger. end of the sleeve 2. donewhie theI sleeve; is' in a retractedposition, andwhen tifre'bag'nefckl is in vproper position', aroundl the enlargement 4, the'.

sleeve isA moved axially wedging engagement .lmrewitl'i andtightenedby means of the secming 'An advantage of the rostmotioncmmecnmrbe;

tween the channel'l and ange 15 shown in Fig. 3, in connection with a relatively short coupling conduit removably attachable to a fan casing outlet, is that of the loosening of Y the vwed'gingv connection. between the sleeve and the bag.- To this end, the coupling may dfirst be dissociated from the fan casing outlet and the securing ring 3 retracted toward `the fan casingend ofthe tube l as far as the channel 18 will 'permit The operator, by holding the sleeve 2 in one hand and. striking a sharp blow with the otlierhandagainstthe fan casing end of the tube 1.1.. .may loosen an `vunusually tight connection muohanone easily than could be accomplished by employing the securing ring as a pulling medium.

'Y The. present4 invention is particularly useful in ,connection with ai dust collecting apparatus of the type in which the porous paper dust collecting baais enclosed in and supported by an outer bag of cloth or the like suchas is shown in our Patent No: 1905,069;-issued` April 25,1933. In connection with auch a dust coileeting apparatus; the rieci'r'of;r the outer bag-may be Aenclosed around the intermediate region the sleeve 2 so as teembrace the same snugly, and? the enlargedhene of said-sleevewillithence be snugly seated; within the outer bag andV will resist any tendency'of the Y'outer bag torecede .axially from the coupling'al Stich" ay tendencyv will:i becaused' bythe stretching of theY outer bagto connnodate the coupling; anni is due to the resilient-'natured the bag walls tending to pullV back to a normalv unstretclzed statei. Y lGth'er modesof4 applying theprinciple off" our invention mayv beemplbyed efthefene explainedi changev beingv made as regarde' the mechanism hereindi'sclosed, provided the means statedl by' any" of the following claimsorA the equivalent of such stated means be employed.

' lW'e therefore particulay-pointf out and distinctlyfclaiinas our invention: Y v v l". A suction'- cleanerA bag coupling comprising 'as tube forming" a 'continuationof' adinet ladenY n air sfti'e'anr delivery conduit of said cleaner;v an

annularenlargement for-'med sa'ditubeftoward f its projecting` end,a sleevefeneirclng said tube between said'V conduit fandgsaid proectingf end; ss'id sleevef'being" tapered' outwardly' toward said end and? siidable axially'on said tube, anzintermediatek region of the interior tapered surface thereof being adapted. to contactthe exterionsurface oi" said enlargement, and means-located; be;-

tween' said yconduit land projecting: end` of: said tube, to axially advance andsmcurelyhnldaid sleeve in engagement' with aibag neck received Y between said sleeve and saidrenlargernentmfsuc'tion cleaner: bagcouplng; commsillgl a'tube 'af continuation/oi ay dust.

air stream delivery conduit of' saidcleaner, an enlargexxnent;v formed ont said' tube toward itsfpe'owing emi:r a: sleeve encireling said tube saisleeveibeiug tapered'outwimlly end; andi-slitlable axially on: said tube, an. 'milenamediat'e region of the interior--tapered-V surface Vthereof beingv adapted'tofcontact faceofisaidi enlargement; said enlargement; being Yformed `vivith-a conical nos'efacing toward; said projecting endlofthe'tube and the of ythe sleeve projecting over said `nose wlmem the curely lipid saidsleevel inengagement with a 'between' said conduit. and said..progecting emi'.`

Y bag neck received between said sleeve'andvsaid enlargement.

outer surface of said enlargement, the outer portions of the sleeve and tubeformng between them, an axially opening, bag neck, receiving mouth, and means located between said conduit and projecting end of said tube, to axially advance and `securely hold, said sleeve in such en,

- gagement.

4. A suction cleaner-bag coupling comprising a tube forming a continuation of 'a dust-laden air stream delivery .conduit of said cleaner, an

annular enlargementl formed on said tube toward the projecting endA thereof, a sleeve encircling v said -tube between said conduit and said projecting end, said sleeve being tapered outwardly to-,.

ward said end and axially slidable on said tube f to a position-where a bag neck received between said sleeve and the enlargement will be engaged between an intermediate region of the tapered inner surface of the sleeve and the-exterior surface of said enlargement, said enlargement being formed with a conical nose facing toward said projecting end of the tube, andthe larger end -oi the sleeve beingV formed with an outwardly flared portion projecting over ysaid nose when the sleeve engages the bag neck against the enlargement, and forming therewith an annular, axially opening, radially outwardly and radially inwardly flaring mouth, and means located between said conduit and projecting end of said tube,toaxial1y advance and securely hold said sleevein such engagement.

5. A suction cleaner bag coupling comprising a tube forming a continuation of a rdust laden air stream'delivery conduit of saidcleaner, an

1 annular enlargement formedon said tube toward the projecting end thereof, y a sleeve encircling said tube between-said conduit and said projecting end, said sleeve being tapered outwardly to.r wardsaid end and axially slidable on said tube to a positionwhere a lbag neck vreceived between said sleeve and the enlargement will be engaged between the sleeve and s aid enlargement, a ra-` dially inwardly smaller end of said` sleeve, and aV securingnut opening channel formed on the` threadably encircling said tube and provided with a radiallyoutwardly projecting vannularyfiange swivelled in saidchannel, for moving said sleeve into bag neck engaging position.

` 6.*Av suction cleaner bag coupling comprising a tube forming a continuation of a dust'laden annular enlargement formed on said tube toward the projecting end'thereof, a. sleeve encircling yair stream delivery' conduit of said cleaner, an

said tube between said conduit and said project-.-

ing end, said sleeve being tapered outwardly toward said end and axially slidable on said tube to a position where a bag neck received between said sleeve and the enlargement will be engaged Vbetween the sleeve and said enlargement, said enlargement being cutaway abruptly on its side toward said conduit, to form an annular shoulder positioned to engagebetween itand the inner tapered'surface of the sleeve'the neck of apaper dustlcollectingbag, along an` axially narrow, annular portion of said neck, an annular space being fori-ned between'` the sleeve andsaid inner tube,

extending from said shoulder toward the con-` stricted end of the sleeve, in whichl space the bag neck is relatively free to form longitudinal corrugationsV in conforming'to the interior 'ofl thel sleeve,'and means located-between said conduit and projecting end oi said tube,` to axially advance and securely holdsaid sleeve in such en' gagement.

"7. A suction cleaner bag coupling comprising a tube forming a continuation of a dust laden air stream deliveryV conduit oi said cleaner, an annular enlargement formed on said tube toward the projecting end thereof, `a'sleeve encirclingv saidl tube between said conduit andsaid projecting end,sa'id` sleeve beingtapered outwardly toward said end and axially slidable on said tube yto a position where a bag neck received between said 4sleeve andthe enlargement will been'gaged between the sleeve and said enlargement, a securing fnut threadably encircling said tube adjacent the smaller end of said sleeve, and a lost motion rotatable connectionv attaching said nut to the small end ofthe sleeve, such as to allow f limited axial movement ofthe sleeve relative to4 `the nut', said .tube terminating, beyond said nut opposite the projectingend, in a portion` detachable from said conduit, wherebyV a .blow struck against the end jof said `portion while the Vsleeve is being held, will serve to'loosen wedging connection between `said sleeve'l and the yconical face.

vDEWEY M. DOW;

FREDERICKy REBEL, JR. 

